//package Campus.help.gateway.Filter;
//
//import Campus.help.common.utils.JwtUtil;
//import Campus.help.gateway.vo.LoginUser;
//import io.jsonwebtoken.Claims;
//import org.springframework.data.redis.core.RedisTemplate;
//import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
//import org.springframework.security.core.context.SecurityContextHolder;
//import org.springframework.util.StringUtils;
//import org.springframework.web.filter.OncePerRequestFilter;
//
//import javax.annotation.Resource;
//import javax.servlet.FilterChain;
//import javax.servlet.ServletException;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import java.io.IOException;
//import java.util.Objects;
//
////@Component
//public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
//
//    private static final String prefixName = "User:Long:";
//    @Resource
//    private RedisTemplate<String, LoginUser> redisTemplate;
//
//    @Override
//    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
//        //获取token
//        String token = request.getHeader("token");
//        if (!StringUtils.hasText(token)) {
//            //放行
//            filterChain.doFilter(request, response);
//            return;
//        }
//        //解析token
//        String username;
//        try {
//            Claims claims = JwtUtil.parseJWT(token);
//            username = claims.getSubject();
//        } catch (Exception e) {
//            e.printStackTrace();
//            throw new RuntimeException("token非法");
//        }
//        //从redis中获取用户信息
//        String redisKey = prefixName + username;
//        LoginUser loginUser = redisTemplate.opsForValue().get(redisKey);
//        if(Objects.isNull(loginUser)){
//            throw new RuntimeException("用户未登录");
//        }
//        //存入SecurityContextHolder
//        //TODO 获取权限信息封装到Authentication中
//        UsernamePasswordAuthenticationToken authenticationToken =
//                new UsernamePasswordAuthenticationToken(loginUser,null,null);
//        SecurityContextHolder.getContext().setAuthentication(authenticationToken);
//        //放行
//        filterChain.doFilter(request, response);
//    }
//}